setLayoutParams Android

setLayoutParams Android

view.setLayoutParams(new LinearLayout.LayoutParams(
       LinearLayout.LayoutParams.MATCH_PARENT,
       LinearLayout.LayoutParams.MATCH_PARENT
));

Android Intent

2016/10/02

Android Intent
启动 Activity：

要启动的Activity.class
Intent intent = new intent(this, Activity.class);

要传递的数据
intent.putExtra("key", "message);

启动开始
startActivity(intent);



在被启动的Activity.class内获取数据
获取Intent
Intent intent = getIntent();

获取数据
String message = intent.getStringExtra("key");




        if(getIntent().getStringExtra("key2") != null) {
            TextView tv = (TextView) findViewById(R.id.textView2);
            String kk = getIntent().getStringExtra("key2");
            tv.setText(kk);
        }

widget のレイアウトの変更

widget のレイアウトの変更

import android.graphics.Color;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutCompat;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

import static android.view.ViewGroup.*;
import static android.widget.LinearLayout.*;
import static com.example.e560.m1001a.R.id.wrap_content;

public class MainActivity extends AppCompatActivity {

    public static boolean j = true;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
//        setContentView(R.layout.activity_main);

        t1();
    }

    protected void t1(){
        final LinearLayout ll = new LinearLayout(this);
        final TextView tv1 = new TextView(this);
        final TextView tv2 = new TextView(this);
        final Button tb = new Button(this);

        tv1.setBackgroundColor(Color.BLUE);
        tv1.setText("" + Color.BLUE);
        tv2.setBackgroundColor(Color.CYAN);
        tv2.setText("" + Color.CYAN);
        tb.setText("button");
        ll.addView(tv1);
        ll.addView(tv2);
        ll.addView(tb);
        setContentView(ll);
        tb.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Button b = (Button)v;
                if(j){
                    j = false;
                    ll.setOrientation(VERTICAL);
                    tv2.setLayoutParams(new LinearLayout.LayoutParams(
                            LinearLayout.LayoutParams.MATCH_PARENT,
                            LinearLayout.LayoutParams.WRAP_CONTENT
                    ));

                    tv1.setLayoutParams(new LinearLayout.LayoutParams(
                            LinearLayout.LayoutParams.MATCH_PARENT,
                            LinearLayout.LayoutParams.WRAP_CONTENT
                    ));

                    tb.setLayoutParams(new LinearLayout.LayoutParams(
                            LinearLayout.LayoutParams.MATCH_PARENT,
                            LinearLayout.LayoutParams.WRAP_CONTENT

                    ));

                }else{
                    j = true;
                    ll.setOrientation(HORIZONTAL);
                    tv2.setLayoutParams(new LinearLayout.LayoutParams(
                            LinearLayout.LayoutParams.WRAP_CONTENT,
                            LinearLayout.LayoutParams.WRAP_CONTENT
                    ));

                    tv1.setLayoutParams(new LinearLayout.LayoutParams(
                            LinearLayout.LayoutParams.WRAP_CONTENT,
                            LinearLayout.LayoutParams.WRAP_CONTENT
                    ));

                    tb.setLayoutParams(new LinearLayout.LayoutParams(
                            LinearLayout.LayoutParams.WRAP_CONTENT,
                            LinearLayout.LayoutParams.WRAP_CONTENT

                    ));
                }
                setContentView(ll);
            }
        });
    }
}

Android Spinner

Android Spinner

Android

package com.example.java.m0926a;

import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.Spinner;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        RelativeLayout rl = new RelativeLayout(this);
        Spinner sp = new Spinner(this);

        List<String> list = new ArrayList<String>();
        list.add(new String("日本語"));
        list.add(new String("中国語"));
        list.add(new String("韓国語"));
        list.add(new String("英語"));
        System.out.println(list.indexOf("b"));

        mya mm = new mya(MainActivity.this, list);
        sp.setAdapter(mm);
        int a = ViewGroup.LayoutParams.MATCH_PARENT;
        int b = ViewGroup.LayoutParams.WRAP_CONTENT;
        rl.addView(sp, new RelativeLayout.LayoutParams(a,b));
//        rl.addView(sp);
        setContentView(rl);

    }

    public class abc {
       View v = new  RelativeLayout(MainActivity.this);
    }

    public class mya extends BaseAdapter{
        private Context context = null;
        private List<String>list = null;


        public mya(Context context, List<String> list){
            this.context = context;
            this.list = list;
        }

        @Override
        public int getCount() {
            return list.size();
        }

        @Override
        public Object getItem(int position) {
            return null;
        }

        @Override
        public long getItemId(int position) {
            return 0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {

            LinearLayout ll = new LinearLayout(context);
            TextView tx = new TextView(context);
            tx.setText(list.get(position));
            TextView tx2 = new TextView(context);
            tx2.setText(" index = " + position);
            tx2.setBackgroundColor(R.color.colorAccent);

            tx2.setBackgroundResource(R.color.colorAccent);

            ll.addView(tx);
            ll.addView(tx2);

            return ll;
        }
    }
}

Android Calendar

Android Calendar

TimeZone tx = TimeZone.getTimeZone("Asia/Tokyo");
Calendar d = Calendar.getInstance(tx);

または
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(activity_main);

        TextView tv0 = (TextView) findViewById(R.id.textView);
        TextView tv1 = (TextView) findViewById(R.id.textView2);
        TextView tv2 = (TextView) findViewById(R.id.textView3);
        TextView tv3 = (TextView) findViewById(R.id.textView4);
        TextView tv4 = (TextView) findViewById(R.id.textView5);
        TextView tv5 = (TextView) findViewById(R.id.textView6);
        TextView tv6 = (TextView) findViewById(R.id.textView7);
        TextView tv7 = (TextView) findViewById(R.id.textView8);
        TextView tv8 = (TextView) findViewById(R.id.textView9);

        Calendar c = Calendar.getInstance();
        tv1.setText(c.getTime().toString());

        tv2.setText(TimeZone.getDefault().getID().toString());
        tv3.setText(String.valueOf(c.get(Calendar.HOUR_OF_DAY)));
//        tv3.setText(String.valueOf(c.get(Calendar.HOUR)));        tv4.setText(String.valueOf(c.get(Calendar.MINUTE)));
        tv5.setText(String.valueOf(c.get(Calendar.SECOND)));
        tv6.setText(String.valueOf(c.get(Calendar.YEAR)));
        tv7.setText(String.valueOf(c.get(Calendar.MONTH)));
        tv8.setText(String.valueOf(c.get(Calendar.DATE)));

    }